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-- EFL LuaJIT bindings: Eina (iterator module)
-- For use with Elua
local ffi = require("ffi")
local C = ffi.C
ffi.cdef [[
typedef struct _Eina_Iterator Eina_Iterator;
typedef unsigned char Eina_Bool;
void eina_iterator_free (Eina_Iterator *iterator);
Eina_Bool eina_iterator_next (Eina_Iterator *iterator, void **data);
Eina_Bool eina_iterator_lock (Eina_Iterator *iterator);
Eina_Bool eina_iterator_unlock (Eina_Iterator *iterator);
void *eina_iterator_container_get(Eina_Iterator *iterator);
]]
local cutil = require("cutil")
local util = require("util")
local M = {}
local eina
local init = function()
eina = util.lib_load("eina")
end
local shutdown = function()
util.lib_unload("eina")
end
ffi.metatype("Eina_Iterator", {
__index = {
free = function(self) eina.eina_iterator_free(ffi.gc(self, nil)) end,
next = function(self)
local data = ffi.new("void*[1]")
local r = eina.eina_iterator_next(self, data)
if r == 0 then return nil end
return data[0]
end,
lock = function(self) return eina.eina_iterator_lock (self) ~= 0 end,
unlock = function(self) return eina.eina_iterator_unlock(self) ~= 0 end,
container_get = function(self)
local v = eina.eina_iterator_container_get(self)
if v == nil then return nil end
return v
end
}
})
cutil.init_module(init, shutdown)
local dgetmt = debug.getmetatable
M.Iterator = util.Readonly_Object:clone {
__ctor = function(self, selfmt, iter)
-- prevent null stuff
if iter == nil then iter = nil end
if iter then ffi.gc(iter, iter.free) end
selfmt.__eq = function(self, other)
return selfmt.__iterator == dgetmt(other).__iterator
end
selfmt.__call = function(self)
return self:next()
end
selfmt.__iterator = iter
end,
free = function(self)
self = dgetmt(self)
if not self.__iterator then return end
self.__iterator:free()
self.__iterator = nil
end,
next = function(self)
self = dgetmt(self)
if not self.__iterator then return nil end
return self.__iterator:next()
end,
lock = function(self)
self = dgetmt(self)
if not self.__iterator then return false end
return self.__iterator:lock()
end,
unlock = function(self)
self = dgetmt(self)
if not self.__iterator then return false end
return self.__iterator:unlock()
end,
container_get = function(self)
self = dgetmt(self)
if not self.__iterator then return nil end
return self.__iterator:container_get()
end,
to_array = function(self)
local ret = {}
for v in self do
ret[#ret + 1] = v
end
return ret
end
}
local Iterator = M.Iterator
M.Ptr_Iterator = Iterator:clone {
__ctor = function(self, selfmt, ptrtype, iter)
Iterator.__ctor(self, selfmt, iter)
selfmt.ptrtype = ptrtype
end,
next = function(self)
local v = Iterator.next(self)
if not v then return nil end
return ffi.cast(dgetmt(self).ptrtype, v)
end
}
M.String_Iterator = Iterator:clone {
next = function(self)
local v = Iterator.next(self)
if not v then return nil end
return ffi.string(v)
end
}
return M
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